Printing ink



Patented May 9,

F-FI'CE ramrmd' INK Dominic J. Bcrnardi, Bronx, N. YQassignor .to' Interchemioal Corporation, New York, N. Y., a

I ,vj corporation Ohio a No Drawing.

This invention relates fto typographic printing inks useful in the printing or bread-wrappers, and aims to provide an inexpensiveink of this character characterized by its utility on all types of rollers, by its ability, to waxed. immediately after printing, by its .laclr'ijtof harrntul effect on the sealing characteristicsoi the finished breadwrappers, and by its relatively slight odor.

In the manufacture. or'printed bread wrappers and the like, the finished prints must be waxed,

' used ior packaging and. then sealed. For years,

the only inks used for thispurpose were conventional linseed oil inks; "while'these dried slowly and had an undes'ir'ablebdor, they were inexpensive, had little: efiect on the sealing} of the finished packages, and were useful both with glue glycerine and rubber rollers.

Application November 14, 1942, Serial No. 465,633 I Typical examples of The wax-set inks described in the M001: U. S.

Patents 2,081,949 and"2,086,4 2 8 never came into extensive use ior bread wrapper printing, in spite of their ability to besetby waxgand their relative lackoi' odor. v e the second'reaso'n was'the adverse 'eil'e'ct these inks had on the sealing of the finished bread wrappers. 7

Water setting Gessler et al. Patent 2,157,385) have also been usedzin this field; while they cannot be used with Blue glycerine rollers.

do not print in humid weather as well as is sometimes ;desirable,- andvare somewhat expensive, .they'haveto "some extent replaced the linseed oilinks heretoiore'used, largely because oi theirlackoi odor.

I have-invented a t pographic printing ink particularly? adapted for bread-wrapper printing,

7 characterizedby low cost, excellent printability on all sorts or commercial rollers and under all sorts of humidity conditions, der hot wax, My inks comprise pigments dispersed in vehicles the-non-volatile film-forming constituents of which consist essentially oi sulionated fatty material, and from 75 to film-forming agents sol-' 40% ct water-insoluble uble in the sulionated oil. a major portion'oi the non-sulfonated material being a resin soluble in the sulionated oil, the balance being a viscosity-reducing material such as fatty acids-( The sulionated oil able on the market, such sultonated coconut oil,

soluble in these oils,

cost, rosin and its derivatheir inertness ungood odor and acceptable sealing.

of from 25 to 60% One reason was expense; I

may be any of the wate soluble sulionated non-drying Iatty oils avails" as suli'onated castor oil, sultonated oleic acid; and the like. The resin may be chosen from the group Hydrogenated rosin Rosinlmaleicacidadduct tives are preferred (e. g. ester gum, maleic acid treated rosin, etc.). Hydrogenated rosin gives the very best results for lack of odor. The vis-' cosity reducer preferably consists of oil 'fatty acids. Talloil is a preferred source of the viscosity reducing acids, since some rosin is also present, and his very cheap. Alternatively, a very slowly volatile solvent such as i'liethylene glycol may be used as the viscosity reducer.

If morethan 60% of sulfonated oil is'used in my ink, the prints are liable to attack by the water used in slossing the paraflin after printing and waxing; if less than 25% is used, the ink cannot be wax-set, and interferes with the sealing operation.

my invention are the iollowing:

- Example 1-Varnish Parts by weight Hydrogenated rosin Talloil (viscosity reducer) Ronople oil (sulfonated castor oil substantially tree or water) The ingredients are melted together.

' Example 2-Varnish Parts by weight 30 Tallnil 20 Sulfonateci castor oil (75% aqueous 'solution) The ingredients are melted together, and heated with stirring until the water evaporates.

Example 3-Varnish 7 Parts by weight 30 45 This varnish shows how a glycol may be used as a viscosity, reducer. In spite oi the fact that the diethylene glycol is not affected by the water used in the wax- Rnnople i Diethylene glycolglowing process,- whereas its total replacement 'by -,;sulionated oil would produce an ink so Example l-Liflkt blue ink to; a Partsbyweight f Varnish of Example 1 54.5 are milled with I Titanium dioxide 41.7

Ultramarine biue'BEESBEIIIIIIIIII as is water-soluble,-this ink This ink prints nicely, is inert under wax. and gives an odorless iilm which is not aftected by water, and which permits of good sealing.

Example 5-Yellow ink Parts by weight Varnish of Example 1 69 is milled with Chrome yellow $1 The ink is similar to that of Example 4.

The above formulas merely illustrate my invention, and various substitutes maybe made for the various ingredients without departing from the scope of the invention as defined by the 1 claims.

I claim: 1 A typographic printing ink characterized by the production of films on paper which are inert and water-resistant under parafiin, and which do not substantially affect the sealing properties of the paraflin, comprising pigment dispersed in a vehicle, the non-volatile constituents of'which a consist essentially of from to 60% of sultonated fatty material, and irom '15 to 40% of water-insoluble film-forming agent soluble-in the fatty oil, a major proportion of the water-insoluble agent being a resin soluble in the sul- I fonated oil, the vehicle containing-a viscosityreducing agent to obtain typo raphic printing ink consistency.

2. A typographic printing ink characterized y the production of films on paper which are inert and water-resistant under paraflin, and which do not substantially affect the sealing properties of the paraffin, comprising pigment dispersed in a vehicle, the non-volatile constituents of which consist essentially of from 25 to 60% of sulfonated fatty materiaband from 75 to of water-insoluble film-forming agent soluble in 10 the fatty oil, a major proportion of the waterinsoluble agent being a resin soluble in the sulfonate'd oil, and a minor proportion being a viscosity reducing agent consisting essentially of oil fatty acids.

3. The composition of claim 2, in which the resin is hydrogenated resin.

4. A typographic printing ink characterized by the production of films on paper which are inert and water-resistant under paraflin, and which do 20 not substantially affect the sealing properties of the paramn, comprising pigment dispersed in a vehicle, thenon-volatile constituents of which consist essentially of'from 25' to of sulfonated fatty material, and from to 40% o! a 25 mixture of a hydrogenatedrosin and talloll in such proportion that the resin predominates in.

the mixture.

Domino J. nanmnm. 

